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What is the difference between 4 mil and 6 mil plastic? 3 mil vs 4 mil?

Posted by The Plastic Sheeting Gurus! on Tue, Jun 21, 2022 @ 09:47

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Mil Thicknesses:  4 mil vs 6 mil.  3 mil vs 4 mil...are we splitting hairs?

How thick is 3 mil plastic, 4 mil plastic? What does mil mean? Is 3 mil or 4 mil thicker?


A "mil" is a measurement that equals one-thousandth of an inch, or 0.001 inch. Most human hair is one-thousandth of inch, or 0.001 inch = 1 mil. There are 1000 mils in an inch.  To convert inches to mils, multiply the inch value by 1000.   As you increase the mils from 1 to 2 to 3 and so on, the thickness goes up or increases.  The bigger the mil "usually" the stronger the plastic sheeting. There are exceptions to this.

When you add string or scrim as it is called to the plastic a 6 mil string reinforced plastic sheeting film is stronger than a regular 6 mil plastic sheeting film.

                                How do you know if you need a 3mil film, a 6 mil film and so on?

Check this chart out....Or you may call us and we will assess your situation and make suggestions.

Plastic Sheeting Thickness chart. How thick is best for you? Click for pricing/ info